Datasheet MF431ST Datasheet (MITEL)

10

Applications

• FDDI

• ATM-SDH/SONET 155Mbps

• Intra-Office

Telecommunications

• General Purpose

Features

• 1320nm Surface-Emitting

LED

• 125MHz Bandwidth

• Designed for 62.5/125µm

Fiber

• Aligned in ST

®

Receptacle

• MTTF >1,000,000 hours

Description

This LED is designed for
Datacom, Telecom and General
Purpose Applications. It has a
long wavelength LED for links up
to 10 km at 125Mbps. It meets
standards for FDDI (ANSI
X3T9.5) and ATM155Mbps.

The device is optimized for

62.5/125µm fiber and actively
aligned in an ST® receptacle.
The MF432 PIN Photodiode
is recommended as Receiver
for this LED.

13324.11 1997-04-01

DETECTOR

FIBER

MF431 LED

BOTTOM VIEW

ANODE

CASE

CATHODE

MF431 Datacom, Telecom, General Purpose LED

Ordering Information

PART # RECEPTACLE

MF431 ST ST

-40°C to +85°C

ST Assembly

MF431 ST

MF431 Functional Diagram

11

Thermal Characteristics

Units

˚C/W
˚C/W
%/˚C

nm/˚C

Max.

200
300

Min. Typ.

-0.75

0.45

Symbol

R

thjc

R

thjb

dP/dT

j

∆λ/dT

j

Parameter

Thermal Resistance - Infinite Heat Sink
Thermal Resistance - On PCB
Temperature Coefficient - Optical Power
Temperature Coefficient - Wavelength

Optical & Electrical Characteristics (Case Temperature -25 to +70˚C)

Units

dBm

ns

MHz

nm
nm

V
µA
pF

Test Conditions

I

Peak

=60mA (Note 1, 2)

I

F

=60mA (Note 2, 3)

I

F

=60mA (Note 2)

I

F

=60mA (Note 3)

I

F

=60mA (Note 3)

I

F

=60mA

V

R

=1V

V

R

=0V, f=1MHz

Max.

2.5

1355

170

1.65
100

Min.

-19

1285

Typ.

2.0

125

1320

135

1.3

200

Symbol

P

fiber

trt

f

f

c

λp

∆

λ

V

F

I

R

C

Parameter
Fiber-Coupled-Power (Fig 1, 2, 3)
Rise & Fall Time (10-90%, no bias)
Bandwidth (3dBel)
Peak Wavelength
Spectral Width (FWHM)
Forward Voltage (Fig 5)
Reverse Current
Capacitance

Note 1: Average power at 10MHz/50% duty cycle. Measured at the exit of 100m of fiber.
Note 2: 62.5/125µm graded index fiber (NA = 0.275).
Note 3: Meets the FDDI ANSI X3T9.5 specification for FDDI.

Absolute Maximum Ratings*

Units

°C
°C

mW

mA
mA

V

°C

Max.

+85
+85
160

80

130

0.5

260

Min.

-40

-40

Symbol

Tstg

Top
Ptot

IF

IFRM

VR

Tsld

Parameter

Storage Temperature
Operating Temperature (Fig 4)
Electrical Power Dissipation (Fig 4)
Continuous Forward Current (f≤10kHz)
Peak Forward Current (duty cycle ≤50%, f≥1MHz)
Reverse Voltage
Soldering Temperature (Note 1)

*Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.
Note 1: 2mm from the case for 10s.

Datacom, Telecom, General Purpose LED MF431

12

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

RELATIVE FIBER-COUPLED POWER

0

20

40

60

80

100

%

0

20 40

60

80

100

µm

RELATIVE FIBER-COUPLED POWER

r - RADIAL DISPLACEMENT OF FIBER

r

z = opt.

Øc =

62.5 µm

z

0

20

40

60

80

100

%

0

40 80

120

160

200

mA

FORWARD CURRENT

50% DUTY CYCLE

DC

HEAT SINKED

mW

300

200

100

0

0 50 100

150 °C

ON PC BOARD

OPERATING TEMPERATURE

MAX. ELECTRICAL POWER DISSIPATION

INFINITE

HEAT SINK

0

20

40

60

80

100

%

0.5

1.0 1.5

2.0

2.5

3.0

mm

z - AXIAL DISPLACEMENT OF FIBER

RELATIVE FIBER-COUPLED POWER

r

r = opt.

Øc = 62.5 µm

z

FORWARD VOLTAGE

FORWARD CURRENT

mA

200

100

0

0

1 2

3

V

RELATIVE FIBER-COUPLED POWER

MF431 Datacom, Telecom, General Purpose LED

13

12.7

MARKING SIDE

SLOT SIDE

9.5

0.4

7.89

2-56 UNC - 2B

max.0.5

min.12 20.1

3.9

5.4

7.6

3/8"-32 UNEF

0.006

FIBER

END

Ø2.5

Ø2.502
+0.01

0

+0

-0.004

RECOMMENDED

FERRULE

(not included)

5.4

2.5

Typical Drive Circuit ST Packaging Hardware

Note: The LED chip is isolated from the case. All dimensions in mm.

Datacom, Telecom, General Purpose LED MF431

MF431 ST Mechanical Data

3/8 - 32 UNEF
2B THREAD

MF431

ECL

V

REF

I

-5V

9.53

HEX-NUT

WASHER

12.70

10.41

1.65

14.27

0.46

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